We’re all familiar with how costly data can be on our iOS devices if we’re using them to get on the internet abroad with no access to a Wi-Fi hotspot. To prevent nasty charges, most of us turn off data roaming and avoid using our devices for the internet.

However, there’s a nasty bug in Apple’s iOS operating system that could cost you a fortune while you’re on vacation by allowing you to download apps over a 3G data network even with the feature turned off.

Remember that ‘fantastic’ native Gmail app that Google was on the ‘verge’ of releasing? They’ve done gone and released it, and it’s available now as a free download for your iPhone, iPad or iPod touch running iOS 4 or above.

If you received a video file via email or stumbled across a clip in Safari that you wanted to save under iOS 4, it just wasn’t possible. You could watch it, but you couldn’t save it. However, one feature you may not yet have noticed in iOS 5 is that you can now download videos to your camera roll.

If you thought untethered jailbreaking was dead, then think again. i0n1c, the jailbreaker behind the iOS 4.3.1, 4.3.2, and 4.3.3 untethered jailbreaks, reports that an untethered jailbreak for iOS 5 is already “covered” — days before the release goes public.

Shortly after Apple’s ‘Let’s talk iPhone’ event yesterday, the company finally seeded the Gold Master release of its highly-anticipated iOS 5 software. Until now, you had to have your device’s UDID registered to get your hands on the software early, but that’s not the case with the GM release — anyone can download and install it onto their device.